On Mon, Aug 01, 2022 at 02:07:53AM +0000, Elliott, Robert (Servers) wrote: > I see the glibc discussion about arc4random has led to a proposal this > weekend to add a vDSO for the linux kernel's getrandom(). It'll be > interesting to see if that is accepted - Linus' initial reaction was "no".
I was surprised to see they switched arc4random in glibc to getrandom(). That has a significant performance impact on chronyd, as it calls the function for each generated RX and TX timestamp. In my test the maximum number of requests per second handled as a server dropped by about 25%. That's not great. We'll need to disable the function on Linux, at least until the vDSO getrandom() is widely available. -- Miroslav Lichvar -- To unsubscribe email chrony-dev-requ...@chrony.tuxfamily.org with "unsubscribe" in the subject. For help email chrony-dev-requ...@chrony.tuxfamily.org with "help" in the subject. Trouble? Email listmas...@chrony.tuxfamily.org.
